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Ross 19B: An Extremely Cold Companion Discovered via the Backyard Worlds: Planet 9 Citizen Science Project

  • Authors: Adam C. Schneider, Aaron M. Meisner, Jonathan Gagné, Jacqueline K. Faherty, Federico Marocco, Adam J. Burgasser, J. Davy Kirkpatrick, Marc J. Kuchner, Léopold Gramaize, Austin Rothermich, Hunter Brooks, Frederick J. Vrba, Daniella Bardalez Gagliuffi, Dan Caselden, Michael C. Cushing, Christopher R. Gelino, Michael R. Line, Sarah L. Casewell, John H. Debes, Christian Aganze, Andrew Ayala, Roman Gerasimov, Eileen C. Gonzales, Chih-Chun Hsu, Rocio Kiman, Mark Popinchalk, Christopher Theissen

Adam C. Schneider et al 2021 The Astrophysical Journal 921 .

  • Provider: AAS Journals

Caption: Figure 1.

unWISE images (Lang 2014; Meisner et al. 2018, 2019) showing the similar proper motions of Ross 19A (upper right) and CWISE J021948.68+351845.3 (lower left) from 2010 (upper panel) to 2019 (lower panel). In these composite images, the W1 frames are color-coded blue and the W2 frames are color-coded red, and (W1+W2)/2 is color-coded green. Note the orange color of CWISE J021948.68+351845.3, indicating that this object is significantly brighter at W2 (4.6 μm) than W1 (3.4 μm), a trait common to late-type brown dwarfs. The white circles indicate the 2010 positions of both objects, while the dark blue circles indicate their 2019 positions. The inset images highlight the positions of CWISE J021948.68+351845.3. North is up and east is left for all images.

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